JPS5845142B2 - Composite type mouthpiece parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates generally to compact fluorescent lamps, and more particularly includes lamp ballasts and electrical adapters. The present invention relates to a composite base member in which a compact single-ended fluorescent lamp is operatively mounted.

BACKGROUND OF THE INVENTION Preheating ballasts for fluorescent lamps are well known and have been in use for many years.

At its simplest, this type of ballast may be a simple coil or choke that simply limits the current when the required starting voltage for the lamp is below the supply voltage.

Without power factor correction, this type of choke-type ballast will
Provides a low power factor of approximately 45% to 60%.

It is known to use additional capacitors with this type of choke to improve the power factor.

Such ballast configurations are described in the Westinghouse Lamp Division Lighting Handbook, revised June 1961.
Lamp DivisionLighting
A general description is given on pages 3-32 and 3-33 of the Handbook.

Series-connected chokes and capacitors used to stabilize low-pressure mercury discharge lamps were introduced on May 3, 1992.
It is disclosed in German Patent No. 2,155,488 dated 1.

A diode bridge, PTC resistor, and glow switch are used to light and relight the lamp.

The PTC resistor used to shunt the capacitor that acts as part of the stabilizing impedance for the fluorescent lamp is manufactured by E.W. Moulton (E, W, Mo.
rton) He is disclosed in U.S. Pat. No. 4,082,981, issued April 4, 1978.

Compact fluorescent lamps with single-end molds of various constructions have attracted much attention in recent years because they have longer lifespans and improved lighting (operation) efficiency compared to ordinary incandescent light bulbs.

An example of this type of lamp is U.S. Patent No. 3.521, issued July 21, 1970 to J.M. Anderson. ．． 12
No. 0, in which a radio frequency power supply is disposed in the base member of the lamp and is used to generate a radio frequency discharge within the lamp outer bulb.

F. Surrma (F, Surrma) 1974
U.S. Patent No. 3,815,080, granted June 4, 2015
No. 5,933,932 discloses a fluorescent lamp adapter in which a ballast transformer is disposed within a composite base member to which an elongated fluorescent lamp is secured.

This allows a standard fluorescent lamp to be inserted into an incandescent lamp socket without modifying it.

To T, LoGiudice 1
U.S. Patent No. 3.953, granted April 27, 19976
, 761 discloses a single-ended compact fluorescent lamp in which a spiral outer tube of various configurations is wrapped around a central core surrounding a lamp ballast.

Wit ting: 197
U.S. Patent No. 3,899,7, granted August 12, 2015
No. 12 discloses a compact single-ended fluorescent lamp in which the outer bulb is helical and the lamp ballast is housed in a central passage surrounded by the helical envelope.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and provides a composite base member that can spatially separate a capacitor and a coil as a ballast element, and can also achieve a good cooling effect due to the ventilation chimney effect. is intended to provide.

Structure of the Invention In order to achieve the above-mentioned object, the composite base member according to the present invention includes an elongated outer tube 28 curved to a sufficiently small size, and a slender outer tube 28 which is disposed close to both ends of the outer tube so as to prevent current flow and breakage. Means 54
a pair of lamp electrodes 36a, 36 interconnected via
b, and lead-in conductors 38a, 38b, 40a, 4 that pass through the ends of the outer tube and are sealed and connected to each of the electrodes.
A compact single-ended fluorescent lamp 26 having 0b and
is adapted to be attached, an electrical adapter member 24 connectable to a household AC power source is connected, and a lamp ballast including a coil 50 and a capacitor 52 connected in series is accommodated. a composite base member 22.78, wherein the lead-in conductor is connected to the electrical adapter member via the lamp ballast;
A container body that is hollow and has a predetermined dimension such that the outer tube protrudes, and includes an open end portion 44 to which the outer tube is attached, and a lower mouthpiece portion 64 to which the electrical adapter member is connected. 42; and mounting members 62, 66, 84 fixed to the container body so as to divide a hollow portion of the container body, the capacitor and the coil being disposed on opposite sides of the mounting member, Ventilation holes 70 and 72 are provided in the mounting member and the lower base part.
It has a configuration characterized in that it is provided with.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments of the invention with reference to the accompanying drawings.

A conventional desk lamp 10 as shown in FIG.
A typical mount includes a base 12, a socket 14, a harp 16 and a lampshade 18 suspended from the harp 16.

Umbrella 18 is partially broken away to show light source 20.

In accordance with the present invention, a compact, single-ended fluorescent lamp 20 is screwed into the socket 14, incorporating the composite base member 22 of the present invention to provide a highly efficient, long-life light source.

An example of a single-ended compact fluorescent lamp unit 20 is shown in FIGS. 2 and 3, in which a composite base member 22 includes an electrical connection such as a lamp ballast and a threaded adapter 24. Contains an adapter member.

The composite base member 22 is adapted for operatively mounting a compact single-cap fluorescent lamp 26.

Fluorescent lamp 26 has an elongated outer or sealed tube 28 that is sharply bent near its midpoint to form a first curved portion 30, as shown in FIG. Thereafter, the once-bent outer tube is further bent twice near the midpoint to form the second curved portion 32.

This outer tube 28 is then coated with a phosphor 33, heated, evacuated, and filled with several torr of inert ionizable starting gas and a small amount of discharge sustaining material, such as mercury 34.

The outer tube portion of the fluorescent lamp is occupied by the composite base member and the lamp operatively attached thereto (the maximum dimension of t4t is as shown in FIG. 1).
It can take on a variety of shapes, such as curved or folded in a predetermined manner, to be small enough to be used as a light source for ordinary lighting fixtures, such as those commonly used with incandescent light bulbs. can.

Fluorescent lamp 26 includes a pair of thermionic electrodes 36a and 36b operatively disposed within outer bulb 28 adjacent opposite ends thereof.

A pair of lead-in conductors 38a, 38b and 40a, 40b pass through both ends of the outer tube and are sealed, and electrodes 36a, 36
b.

According to the invention, the composite base member 22 includes a hollow body 42 having an open end 44 of predetermined dimensions.

The lamp 26 is attached to the composite cap member 22 and projects from the open end 44 of the container body 42.

The electrical adapter member 24 has a base shell 46 and a center contact 48.
It has two terminals like.

The adapter member 24 connects to the open end 44 of the hollow container body 42.
It is attached to the part opposite to and projects from there.

This electrical adapter member 24 has a frequency of 60Hz1120, for example.
■It can be connected to a household AC power source.

The ballast portion of the base comprises a coil or choke 50 and a capacitor 52 connected in series by suitable conductors 53.

Details of this circuit are shown in FIG.

30-40 with T8 size outer tube (2,54cm)
In order to light up Watt's fluorescent lamp, the inductance of the choke 50 is 5001n) (and the capacitor 5
The capacitance of No. 2 is 5 μF.

For these values, the capacitor 5 at household mains frequency
The reactance of 2 is slightly larger than that of coil 50, and the ballast operates as a so-called lead circuit.

2 and 4, when the lamp 26 is operatively connected to the composite base member 22, the series connected coil 50 and capacitor 52 are connected to the electrical adapter member 2.
4 and one lead-in conductor 38a connected to one lamp electrode 36a.

The other lead wire 38b connected to the electrode 36a is connected to one lead wire 40a connected to the other electrode 36b via a current cutter 54.

The other lead-in wire 40b connected to the other electrode 36b is connected to the other electrical terminal 46 of the electrical adapter member 24.

When the lamp connected to the circuit is energized, the current cutoff means 5
4 forms a series circuit passing through the lamp electrodes 36a, 36b to preheat the lamp electrodes 36a, 36b to the thermionic emission state.

Thereafter, the current interrupting means 54 opens and interrupts the series circuit, at which time an inductive surge is generated and a discharge is initiated between the lamp electrodes 36a, 36b.

The current interrupting means 54 may take any of several configurations, and in the illustrated embodiment the current interrupting means 54 is of a conventional type to minimize radio frequency interference during lamp starting. It takes the form of a glow switch 56 and a capacitor 58 in parallel with it.

The glow switch may be replaced by a thermal switch or a pushbutton or a solid state device, all of which are well known.

In the circuit diagram shown in FIG. 4, capacitor 52 is connected in parallel with a variable resistor 60 having a positive salinity coefficient (PTC).

An example of an application of this type of so-called PTC resistor is shown in the aforementioned US Pat. No. 4,082,981, dated April 4, 1978.

Such variable resistors do not have to be used, but if they are used, they increase the initial current through the series circuit and preheat the lamp electrodes when circuit-connected lamps are first energized. The selection is such that the resistance versus temperature characteristic curve is such that capacitor 52 is effectively bypassed by variable resistor 60.

When the lamp is on, variable resistor 60 exhibits a resistance value that is effectively removed from the circuit.

In FIG. 2, hollow container body 42 includes a mounting member 62 that is mounted within the container body to create a separate section.

Container body 42 and mounting member 62 can be formed from metal or plastic.

As a particular example, the mounting member 62 is a flat plate sized to cover the lower base portion 64 surrounding the coil 50.
The mounting member 62 is preferably made of plastic.
are secured by suitable means such as screws 66.

Capacitor 52 is located on one side of mounting member 62, coil 50 is located on the other side of mounting member 62,
Thus, a space is provided between these two ballast elements.

Coil 50 and capacitor 52 are in contact with the ambient atmosphere to facilitate heat dissipation therefrom.

In the preferred embodiment of the invention, lamp 26 has relatively rigid drop conductors 38a, 38b attached thereto.

40a and 40b, the capacitor 52 and glow starter 56 are also attached to a mounting member 62.

To complete the preferred embodiment of the lamp, the outer bulb 28 is preferably surrounded by a light shield or light diffusing member 67.

The light diffusing member 67 preferably has an open top.

This light diffusing member 67 is fitted into a thin cylindrical rim 68 forming the open end 44 of the composite cap container body 22.

A first series of apertures 70 through the container body around the electrical adapter member 24 and a second series of apertures 72 through the mounting member 62 are provided to provide a chimney cooling effect and draw out ambient air. It is adapted to flow into contact with ballast elements 50 and 52.

In the embodiment shown in FIGS. 2 and 3, the coil 50 is secured within the cap 42 on the side of the member 62 opposite the side on which the lamp 26 is mounted.

Capacitor 52 is mounted to mounting member 62 on the same side as lamp 26 is mounted.

These elements may be reversed, and such an embodiment of the lamp unit 20a is shown in FIGS. 5 and 6.

In this embodiment, the coil 5Oa has an elongated shape, and is formed in the shape of a so-called finger-shaped choke with a light reflective coating 73 applied to the outer surface.

Also, in this embodiment, the finger choke 50a is mounted on the mounting member 62, which is the same side as the lamp 26.
The capacitor 52 is secured within the hollow vessel body 42 on the side of the mounting member 62 opposite to the side on which the lamp 26 is secured.

In this way, these ballast elements are separated from each other and the general structure is otherwise the same as described for the embodiment shown in FIGS. 2 and 3, giving a chimney effect. Apertures 70 and 72 are provided.

FIG. 7 shows in isometric view a lamp unit 74 according to another embodiment, in which the outer tube 76 includes:
A bent portion 77 is added to lengthen the discharge path and thus increase the input power and light output of the composite lamp unit.

Details of the construction of this embodiment are shown in FIG. 8, in which the composite base member 78 holds the lamp unit 76 and also includes the ballast coil 50 and the capacitor 5.
2 and a modified mounting member 8 that acts to separate the two from each other.
4 into two parts 80 and 82.

As in the previous embodiment, a chimney effect is provided by the apertures 70 and 72 and the modified light diffuser 67a;
Ambient air contacts and cools the ballast element.

Such an embodiment uses a modified plug-in base adapter 24a.

The end portion 86 of the outer tube 76 is attached to a mounting member 84 for support.
is fitted to the upper surface of the

An additional support element 88 is provided for the outer tube 76.

Other effect components of the invention are the same as those described above.

The ballast of the present invention uses approximately 40 watts of human power to produce 2,000 watts of power.
It can be used to light single-ended compact fluorescent lamps that produce an output of about 1 lumen.

This is compared to a standard incandescent bulb of similar light output.
This results in an efficiency improvement of more than %.

Furthermore, compared to standard single lamp preheat ballasts on the market, the lightweight ballast of the present invention has an operating efficiency that is improved by about 6% over the standard ballast.

Voltage regulation is also very good.

When operated at the inductance and capacitance values described above, this composite ballast weighs approximately 8.3 oz.
grams) and weighs 2.5 inches (6,35 crrL)
It can be fitted into a cube.

In comparison, commercially available ballasts with equivalent stabilizing capacity are 5 inches (12,7 crrL) x ], 55 inches (3.8 crrL) x 1.875 inches (4,
8 cm) and weighs 29.5 ounces (836.3 grams).

Such compactness and light weight are, of course, highly desirable for use in incandescent bulb replacements, such as conventional desk lamps.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway elevational view of an ordinary desk lamp equipped with a compact fluorescent lamp incorporating the composite base member of the present invention, and Figure 2 is a composite base member equipped with a compact lamp unit. FIG. 3 is a partial cross-sectional elevational view of one embodiment of the lamp unit shown in FIG.
4 is a schematic diagram of a preferred ballast circuit of the invention; FIG. 5 is an implementation of a lamp generally similar to that shown in FIG. 2, except that the coil is in the so-called finger shape. Fig. 6 is a cross-sectional view taken along line VI-Vl of the lamp unit shown in Fig. 5, and Fig. 7 is a partially cutaway elevational view of the example. FIG. 8 is a partially cut-away printed view of another embodiment folded inward, and FIG. 8 is a partially cut-away elevational view of the lamp unit shown in FIG. 7. 10... Desk desk lamp, 22.78... Composite type base member, 24... Screw-in adapter, 26...
Single cap fluorescent lamp, 28... Outer tube, 33... Fluorescent body, 34... Mercury, 36a, 36b... Thermionic electrode,
38a, 38b, 40a, 40b"・ Leading wire, 42・
... Hollow container body, 44... Open end, 46... Mouth shell, 48, 50... Coil, 52... Capacitor, 54... Current interrupting means, 56... Glow switch, 58... Capacitor, 60... Variable resistor, 6
2゜84...Mounting member, 64...Lower base part, 67
...Light diffusing member, 70, 72... Opening, 73...
Light reflective coating. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. An elongated outer tube 28 curved sufficiently small, and a pair of lamp electrodes 36a disposed close to both ends of the outer tube and interconnected through a current cutoff means 54. , 36b
and lead wires 38a, 38b, 40a that pass through the ends of the outer tube and are sealed and connected to each of the electrodes.
, 40b, and an electrical adapter member 24 connectable to a household AC power source, and a coil 50 and a coil 50 connected in series. a composite base member 22,7B adapted to receive a lamp ballast including a capacitor 52, the lead-in conductor being connected to the electrical adapter member via the lamp ballast; A container body 42, which is hollow and has a predetermined dimension such that the outer tube protrudes, comprising an open end portion 44 to which a tube is attached, and a lower mouthpiece portion 64 to which the electrical adapter member is connected; and mounting members 62, 66° 84 fixed to the container body so as to divide a hollow portion of the container body, the capacitor and the coil being disposed on opposite sides of the mounting member, A composite base member characterized in that the member and the lower base part are provided with ventilation holes 70, 72. 2 the coil is fixed within the container body on the side of the mounting member opposite to the side to which the lamp outer tube is attached, and the capacitor is fixed within the container body on the same side of the mounting member as the lamp outer tube is attached; A composite base member according to claim 1, which is attached to a base member. 3. The capacitor is fixed within the container body on the side of the mounting member opposite to the side to which the lamp outer tube is attached, and the coil is fixed within the container body on the same side of the mounting member as the lamp outer tube is attached. A composite base member according to claim 1, which is attached to a base member. 4. The composite base member of claim 3, wherein the coil is elongated and projects from the open end of the container body in the general direction of the lamp outer bulb attached to the base member. 5. A composite cap member according to claim 1, wherein the open end of the container body has a thin rim adapted to receive and hold a light diffusing cover member.